New in Symfony 4.2: SameSite cookie configuration
Symfony added support for SameSite cookie attributes in Symfony 3.2 (November 2016). The SameSite attribute prevents the browser from sending cookies along with cross-site requests. In practice, this mitigates the risk of cross-origin information leakage and provides some protection against CSRF attacks.
In Symfony 4.2 we've made it easier to set this attribute in several parts of the framework.
SameSite attribute in "Remember Me"¶
The Remember Me feature now defines a new config option called
to set the value of this attribute in the cookie used by this feature:
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# config/packages/security.yaml security: # ... firewalls: main: # ... remember_me: # ... # possible values: 'strict', 'lax' and null samesite: 'strict'
SameSite attribute in sessions¶
Similarly, the cookies used to manage user sessions now define a new config
cookie_samesite with the same possible values (
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# config/packages/framework.yaml framework: # ... session: # ... cookie_samesite: 'strict'
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